TY - JOUR AU - Wu, Z-J; Lin, Y; Xiao, J TI - Clinical significance of colonoscopy in patients with upper gastrointestinal polyps and neoplasms: a meta-analysis JO - PloS One VL - 9 PY - 2014 DO - 10.1371/journal.pone.0091810 L3 - PubMed-ID: 24637723 SP - e91810 N1 - et al. ER -